Apparatus for forming molds and mold-cores.



J. F. BRYANT. APPARATUS PoR roRMING Moms AND MOLD com.

APPLICATION FILED IEB. 4, 1911. 1,021,349, Patented Mar. 26, 1912.

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Patented Mar. 26, 1912.

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J. F. BRYANT.

APPLIOATION FILED PEB. 4, 1911.

APPARATUS FOR FOBMING MOLDS AND MOLD GORES.

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APPLIDATION FILED PERA, 1911.

Patented Mar. 26, 1912.

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UNITED STATES PATENT OFFICE.

JEROME F. BRYANT, 0F CHICAGO, ILLINOIS, ASSIGNOR 0F ONE-HALF TO HUGH J'. BRYANT, OF YOUNGSTOWN, OHIO.

APPARATUS FOR FORMING MOLDS AND MOLD-CORES.

Specification of Letters Patent.

Application iled February 4, 1911.

To all whom t may concern Be it knownthat I, JEROME F. BRYANT, a

citizen of the United States, residing at Chi-Y cago, in the county cf Cook and State of Illinois, have invented certain new and useful Improvements in Apparatus for Forming Molds and lVIold-Cores; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to metal founding, particularly to mold and coremaking, and to novel apparatus for use in connection Ywith an equally novel method or process, also4 of my invention, for casting pipe and hollow ware in general.

The improved method or process aforesaid forms the subject-matter Yof an independent application for Letters-'Patent Serial No. 605,166, filed in the U. S. Patent Office on the 28th day of January, 1911.

The ultimate object of the present invention is, therefore, the production of pipe or other cast articles of hollow ware, its immediate object being that of producing the molds and mold cores by agency whereof a the said articles are cast or molded.

As further objects, lthe present invention contemplates the practical production of molds and mold cores with speed, accuracy and precision; the employment of a conin-` ing flask adapted to vreceive Sandor similary molding material, ya flexible pattern fof the desired shape, :and a flowing substance such as air or Lother .fluid lander pnessure adapted to kflex or deform said pattern,ftliereby mold-w ing or packingthe molding ymaterial` aforesaid,n Ias will :be hereinafter 'particularly described `and pointed out in the claims :folx I. `adapted ,to mate with :a corresponding .de-

lowing.

In the accompanying drawings which :1 1 form part `.of-this. applica-tion for Letters i' Patent and whereon corresponding numerals of reference indicate corresponding y parts in the several views: Figure 1 is :a: central vertical longitudinal .sectioncthncugh a vertically divided confining flask, its within contained flexible pattern and perforated metallic former, va hinged lid or ycover,-and afvertcal standard constituting a :support for the latter. Fig. 2 is a similar View of 4a core-making flask differing from Fig. 1,

mainly in the rela-tive position of its flexible l pattern and perforated metallic former, and

in the addition of a central core barrel. Fig. 3 is a rear elevation of the confining flask, its hinged cover' and supporting standard, shown by Fig. 1. Fig. 4 is a top plan View of the two-part hinged flask-lid or cover shown in section by Fig. 1. Fig. 5 is a yhorizontal section on the line 5 5, Fig. l, and Fig. y6 is a fragmentary horizontal section on the line r6---6, Fig. 2.

Reference being had to the drawings Land numerals thereon, 1 indicates a base by preference .of cast iron, hollow and oftruncated conc shape, having Aa central hub 2 with radial arms or spider connections 8, and pointed pilot pin 4 shouldered upon said hub and rising vertically therefrom. At one side of base l is an integral boss 5 into which is threaded the lower end of a stand ard 6. This standard is of a length corresponding with `the length or height vof the entire structure, is reduced at its upper end as at 7, and is provided `with a cap-nut 8 for purposes that will later appear.

The numeral 9 indicates a twc-part vertically separable flask having flongitudinal` fflask is thoroughly vented by agency of a:

series of narrow horizontal grooves `l2 fwhich encircle the flask members yand ycompletely sever them into .sect-ions 'independent of yeach other except `for the vertical flanges 11,0 `and ribs 11 aforesaid, Whichserve to re- :tain said sections in their proper'superimfposed relation as best shown by Fig. 3.

At i-ts'lower end the flask' bottom x13 is provided rivith ay concentric projection 14 fpression 1.5 :at the center -o'f base las a means of monnting the flask 9 upon said base; While at its lopposite .or uppermost eX- ftremity the flask is provided with an uen- `.circling flange iadaipted'to Lbe engaged Eby ?100 rclendh flugs 17 upon a two :partwtop-rng or c'over 18 ibest shown'iby Fig. '-4. The :two parts of the r'n-rg'cover 18 are counterparts `:one of lthe `other, .and are hinged or pivotally mounted fupon `the reduced upper end 7 -of' :standard 6 ibeing there secured by the capnut 8 :so as 4to be movable in `the same hori- :Zontal plane, and rwhen closedto engage interiorly a nipple 22 and upon the upper end whereof is threaded exteriorly an annular cap plate 23, the latter having a beveled edge 24 adapted to be engaged by the reversely beveled inner edge 25v of ring cover sections 18 when closed. The cap plate 23 is reinforced by radial surface flanges 26, is provided with an air pipe connection 27, and further wit-h a central ring clevis 28 for lifting purposes.

Surrounding the barrel 21 is a metallic or non-yielding perforated former 29 of the desired shape, upon which is fitted a flexible or elastic pattern 30, preferably of rubber, the latter beaded upon its upper and lower edges as at 81, both of said members 29 and 30 being secured at their lower ends between the head of screw-nipple 22 and the end of barrel 21 as shown by Fig. 1. While, as also shown by said Fig. 1, the pattern f 80, is in like manner secured between the upper flanged end 32 of former 29 and the under surface of cap plate 23 when screwed to its seated or normal position.

This being a description of my present invention in its best form at present known to me, its use and operation may be briefly set forth as follows: The flask 9 having been locked up as indicated by Fig. 1 of the drawings, with a perforated former 29 and its elastic pattern 30 in position, as shown, a partial vacuum is produced within said former by exhausting the air from connection 27. As a consequence the pattern 30 now clings closely to said perforated former, molding material such as sharp sand is next introduced from above between the inner walls of retaining flask 9 and the outer surface of the flexible or elastic pattern 30 thus surrounded, the ring-covers 18 are closed upon cap-plate 23, pressure is introduced through the air connection 27, and this operating equally in all directions from center to circumference through perforations 31, forces the pattern 30 outward,

`thereby packing the molding sand against the inner walls of flask 9, as indicated by dotted lines, to'later serve as the mold for the outer surface of a pipe or other article of hollow ware to be cast. `This accomplished, ring-covers 18 are swung back; the air again exhausted from former 29, and said former, together with its pattern 30, central barrel 21, and cap plate 23, is removed bodily from within the completed mold, preliminary to the substitution of a mold-core when required by the character of an article to be cast.

This being a description of my present 7@ invention in one form of construction, its use and operation, it should be noted that I do not confine my claims to any particular shape or configuration of the elements and parts hereinbefore setforth, nor to the` materials stated, as these may be variously modified without departing from the spirit of my invention. For example, Figs. 2 and 6 of the drawings represent a transposed arrangement and combination of parts for producing moldcores upon substantially the same plan and by'substantially the same means as those heretofore described. In this modified construction there being employed a base 1a, supporting centrally a vertical pilot pin 4a, a flask 9a mounted upon said base and a cover 18 for the flask pivotally supported upon a standard 6a rising from the base 1a aforesaid. In this construction, however, it will be noted that the air pipe connection 27a enters the side o-f flask 9a rather than through its top, that the relative positions of the perfected metallic former 29a and the flexible pattern 30a are reversed, the latter being arranged 95 within the former; and also, that a slidably fitted hollow core-barrel 21a is substituted for the hollow central guide shaft 21. In this or substantially this arrangement of parts a mold-core may be produced as followsz-Air or other operative fluid exhausted from the interior of flask 9a via connection 27a, operating through p'erforations in former 29a, serve to expand pattern 30a, whereupon sand or other similar molding material (not shown), is introduced between said pattern and its within contained core-barrel 21a. Action of the operating fluid now being reversed, the said 'pattern is subjected to pressure, causing it to contract equally in all directions, and to instantly pack the molding material upon the central core-barrel, which, together with the core thus formed, may then be readily and safely removed after again exhausting the operating fluid to Withdraw the pattern 30a out of contact therewith. Obviously, a core thus produced for use in forming the bore of a pipe or other article of cast hollow ware, may be introduced over they pilot pin 4 within flask 9 first above described, and molten metal poured between the aforesaid mold and mold core in the well understood manner which need not be herein dwelt upon.

Having thus described my invention, what I claim and desire to secure by Letters-Patent is:

1. In mold and core making apparatus, the combination with flask for containing.

molding sand, of a flexible pattern Within said flask, and means for flexing said pattern to pack the molding sand.

2. In mold and core making apparatus the combination with a rigid non-yielding flask for containing molding sand, of a flexible pattern Within said flask, and means for flexing said pattern to pack the molding sand upon its face.

3. In mold and core-making apparatus, the combination with a flask for containing molding sand, a perforated former, within said flask, a flexible pattern adjacent to said former and means for flexing said pattern to pack the .molding sand.

4. In mold and core-making apparatus, the combination with a flask for containing molding material, a pilot pin projecting into said flask, a sleeve surrounding said pin, a perforated former surrounding said sleeve, a flexible pattern adjacent to said former, and means for flexing said pattern to pack the molding material.

5. In mold and core-making apparatus, the combination with a flask for containing molding sand, of a flexible pattern Within said flask, and means for flexing said pattern to pack the molding sand by agency of fluid pressure.

6. In mold and core making apparatus, the combination With a flask for containing molding material, having a closed bottom and an open top, of a cent-ral pilot pin projecting into said flask, a removable sleeve inclosing said pin, a perforated former of .non-yielding material, a flexible pattern adjacent to said former, means for introducing fluid pressure Within the former, and a removable closure for the open end of the flask aforesaid.

7. In mold and core-making apparatus, the combination with an outer flask for containing molding material, of a base support for said flask, a standard rising from the base at one side of the flask, a horizontally movable closure for the flask pivotally secured to said standard, a. flexible pattern Within the flask, and means for flexing said pattern to pack the molding material by agency of fluid pressure.

8. In mold and core-making, apparatus, the combination with an outer flask for containing molding material, of an outside standard rising from the base of said flask, a two-part horizontally movable closure for the upper end of flask pivotally secured to said standard, a latch for the meeting edges of said closure sections, an elastic pattern within the flask, and means for expanding said pattern by fluid pressure to pack the molding material upon its face.

9. In a mold and core-making apparatus, the combination with an outer non-yielding flask for containing molding material, of a standard rising from the base of said flask, a two-part horizontally movable annular closure'for the open end of said flask pivotally secured to the standard aforesaid, a central cap-plate over which the said twopart closure closes, means for locking said closure members in closed relation, an elastic pattern Within the flask, and means for eX- panding said elastic pattern by fluid pressure to pack the molding material.

In testimony whereof I aix my signature, in presence of two subscribing witnesses.

JEROME F. BRYANT.

Witnesses:

JosErI-r I. HIGGINS, EDWARD F. KONOVSKY.

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner of Patents,

Washington, I). C. 

